This method is for the collection and analysis of aminoethanol compounds from workplace air samples. Samples are collected on silica gel tubes, desorbed in 2 mL 4:1 (v/v) methanol:water, allowed to stand 2 hours with occasional shaking, and analyzed by GC/FID (flame ionization detector).
The working range of the method is 5 to 300 mg/m³ for each compound in a 20 L air sample. Water vapor does not significantly affect the collection efficiency. The sensitivity of the method may be improved at least ten-fold by using a photoionization or nitrogen-selective detector. Note: This method revises P&CAM 270, S140, and Method 2007 (dated 5/15/85).
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 4 weeks from sampling to analysis if kept at 25°C |
| Preservatives: | Add 20 µL of concentrated HCl to the silica gel tube immediately after sampling. |
| Required Preps: | Silica gel tube, 300 mg/150 mg, SKC 226-10-04 |
| Collection Method: | The method recommends a 0.01 - 0.2 L/min. flow rate and a 4 - 24 L collection volume. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2007
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| 2-Diethylaminoethanol | C6H15NO |
100-37-8 |
0.005 |
mg |
| 2-Dibutylaminoethanol | C10H23NO |
102-81-8 |
0.005 |
mg |
| Ethanolamine | C2H7NO |
141-43-5 |
0.005 |
mg |
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.